Increasing the ADC precision with oversampling in a flash ADC

Abdulrahman Abumurad; Kyusun Choi

doi:10.1109/ICSICT.2012.6467786

Increasing the ADC precision with oversampling in a flash ADC

Abdulrahman Abumurad, Kyusun Choi

Computer Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

10 Scopus citations

Abstract

This paper proposes new design to implement high resolution ADC using the idea of oversampling in flash ADCs. We used 6-bit Flash ADC with 65 times oversampling to gain a resolution of 12-bit Flash ADC. Conventional Flash ADCs are implemented using 2ⁿ comparators while proposed design requires only (2⁶ + L(n)) comparators, Where L(n) is an exponential operator in n with order less than 2n/3. This reduction in chip area would reduce power consumption, since sampling rates for both (conventional Flash ADC and proposed) designs are the same. Signal-to-Noise ratio (SNR) and Distortion (SINAD) of the proposed 12-bit Oversampled-Flash ADC output was only at most 1.7% decrease compared to ideal 12-Bit Sigma-Delta (Δ) ADC. Moreover if an ideal 6-bit flash ADC is used to implement a 12-bit Oversampled-Flash ADC, DNL and INL values for proposed 12-bit oversampled-Flash ADC would be zero.

Original language	English (US)
Title of host publication	ICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings
DOIs	https://doi.org/10.1109/ICSICT.2012.6467786
State	Published - 2012
Event	2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2012 - Xi'an, China Duration: Oct 29 2012 → Nov 1 2012

Publication series

Name	ICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings

Other

Other	2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2012
Country/Territory	China
City	Xi'an
Period	10/29/12 → 11/1/12

All Science Journal Classification (ASJC) codes

Human-Computer Interaction
Electrical and Electronic Engineering

Access to Document

10.1109/ICSICT.2012.6467786

Cite this

Abumurad, A., & Choi, K. (2012). Increasing the ADC precision with oversampling in a flash ADC. In ICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings Article 6467786 (ICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings). https://doi.org/10.1109/ICSICT.2012.6467786

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title = "Increasing the ADC precision with oversampling in a flash ADC",

abstract = "This paper proposes new design to implement high resolution ADC using the idea of oversampling in flash ADCs. We used 6-bit Flash ADC with 65 times oversampling to gain a resolution of 12-bit Flash ADC. Conventional Flash ADCs are implemented using 2n comparators while proposed design requires only (26 + L(n)) comparators, Where L(n) is an exponential operator in n with order less than 2n/3. This reduction in chip area would reduce power consumption, since sampling rates for both (conventional Flash ADC and proposed) designs are the same. Signal-to-Noise ratio (SNR) and Distortion (SINAD) of the proposed 12-bit Oversampled-Flash ADC output was only at most 1.7% decrease compared to ideal 12-Bit Sigma-Delta (Δ) ADC. Moreover if an ideal 6-bit flash ADC is used to implement a 12-bit Oversampled-Flash ADC, DNL and INL values for proposed 12-bit oversampled-Flash ADC would be zero.",

author = "Abdulrahman Abumurad and Kyusun Choi",

year = "2012",

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Abumurad, A & Choi, K 2012, Increasing the ADC precision with oversampling in a flash ADC. in ICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings., 6467786, ICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings, 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2012, Xi'an, China, 10/29/12. https://doi.org/10.1109/ICSICT.2012.6467786

Increasing the ADC precision with oversampling in a flash ADC. / Abumurad, Abdulrahman; Choi, Kyusun.
ICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings. 2012. 6467786 (ICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AB - This paper proposes new design to implement high resolution ADC using the idea of oversampling in flash ADCs. We used 6-bit Flash ADC with 65 times oversampling to gain a resolution of 12-bit Flash ADC. Conventional Flash ADCs are implemented using 2n comparators while proposed design requires only (26 + L(n)) comparators, Where L(n) is an exponential operator in n with order less than 2n/3. This reduction in chip area would reduce power consumption, since sampling rates for both (conventional Flash ADC and proposed) designs are the same. Signal-to-Noise ratio (SNR) and Distortion (SINAD) of the proposed 12-bit Oversampled-Flash ADC output was only at most 1.7% decrease compared to ideal 12-Bit Sigma-Delta (Δ) ADC. Moreover if an ideal 6-bit flash ADC is used to implement a 12-bit Oversampled-Flash ADC, DNL and INL values for proposed 12-bit oversampled-Flash ADC would be zero.

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Increasing the ADC precision with oversampling in a flash ADC

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